Signed-off-by: Stanislav Kholmanskikh <[email protected]>
---
include/safe_file_ops.h | 21 +++++++++++++++++++++
lib/safe_file_ops.c | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/include/safe_file_ops.h b/include/safe_file_ops.h
index 7ff5baa..77ad594 100644
--- a/include/safe_file_ops.h
+++ b/include/safe_file_ops.h
@@ -72,4 +72,25 @@ void safe_cp(const char *file, const int lineno,
#define SAFE_CP(cleanup_fn, src, dst) \
safe_cp(__FILE__, __LINE__, (cleanup_fn), (src), (dst))
+/*
+ * Safe function to touch a file.
+ *
+ * If the file (pathname) does not exist It will be created with
+ * the specified permission (mode) and the access/modification times (times).
+ *
+ * If mode is 0 then the file is created with (0666 & ~umask)
+ * permission or (if the file exists) the permission is not changed.
+ *
+ * times is a timespec[2] (as for utimensat(2)). If times is NULL then
+ * the access/modification times of the file is set to the current time.
+ */
+void safe_touch(const char *file, const int lineno,
+ void (*cleanup_fn)(void),
+ const char *pathname,
+ mode_t mode, const struct timespec times[2]);
+
+#define SAFE_TOUCH(cleanup_fn, pathname, mode, times) \
+ safe_touch(__FILE__, __LINE__, (cleanup_fn), \
+ (pathname), (mode), (times))
+
#endif /* SAFE_FILE_OPS */
diff --git a/lib/safe_file_ops.c b/lib/safe_file_ops.c
index b602345..8cfd264 100644
--- a/lib/safe_file_ops.c
+++ b/lib/safe_file_ops.c
@@ -23,6 +23,9 @@
#include <stdarg.h>
#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include "safe_file_ops.h"
@@ -152,3 +155,41 @@ void safe_cp(const char *file, const int lineno,
src, dst, file, lineno);
}
}
+
+void safe_touch(const char *file, const int lineno,
+ void (*cleanup_fn)(void),
+ const char *pathname,
+ mode_t mode, const struct timespec times[2])
+{
+ int ret;
+ mode_t defmode;
+
+ defmode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+
+ ret = open(pathname, O_CREAT | O_WRONLY, defmode);
+ if (ret == -1)
+ tst_brkm(TBROK | TERRNO, cleanup_fn,
+ "Failed to open file '%s' at %s:%d",
+ pathname, file, lineno);
+
+ ret = close(ret);
+ if (ret == -1)
+ tst_brkm(TBROK | TERRNO, cleanup_fn,
+ "Failed to close file '%s' at %s:%d",
+ pathname, file, lineno);
+
+ if (mode != 0) {
+ ret = chmod(pathname, mode);
+ if (ret == -1)
+ tst_brkm(TBROK | TERRNO, cleanup_fn,
+ "Failed to chmod file '%s' at %s:%d",
+ pathname, file, lineno);
+ }
+
+ ret = utimensat(AT_FDCWD, pathname, times, 0);
+ if (ret == -1)
+ tst_brkm(TBROK | TERRNO, cleanup_fn,
+ "Failed to do utimensat() on file '%s' at %s:%d",
+ pathname, file, lineno);
+}
+
--
1.7.1
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